Pyrometer.



J. W. WEITZENKORN.

PYROMETER.

APPLxcATmN FILED MAR.24.1916.

Patented Dec. 26, 1910.

FIG.2.

INVENTOR WITNESSES were @View JSEH W. VYERZEHGRN, 0F EIliTS-BURG'H, EENN'SYLVANA, ASSIGNOR TQ GIBB ESTRUMENT GNTER?, FITTSBURGH, PENNSYLVANI., A CORPDRATIGN OF rre-emmers Mmmm Specification of Letters letcnt.

ippfcetmi 1li-eroe Q11., 1916. Serie?. No. www.

To c w25/Om ai concern:

Be it imowri that i, l'osrzrrr i?. @Verrerie Homey a citizen or the Unite@ States, residing et ilittsiourglggli9 in the State of Permsyivenia., have invented certain new encluseiui Improvements in Pyrometers, of which the following is 'e specicetiori..

My invention relates to meer.V for optical measurement or estimetioiey of the'tempereture of heated bodies; its primary object is to prooluce e convenient, accurate, reiieieie ard cheep, direct 'Vision pyromcter. L

Other objects are to provie Jfor stendemi- 'ming the comparison color amd the iilumi fietixo thereof' to rovide e iierible @e ee lo i9; s

of oberige of color; to provide e direct tempci-etere reading instrument, and' to gener eliy improve tbe construction emi operetioie of such instruments. l

The invention is ilieetreteci iii e prciierreii form iii the eccomperiyiiigg iii which,

Figere 1 is eretticei ceiitrelieecti'ori of the complete instrument; Fig; t?, ie e pertiel longituciinei 'section9 et right oeglee tliet of Fig.. 1, emi on the iiee (2)- ie the letter :gilre but omitting beitterjf; Fir. '3 'is e fragmento; T emerged View' ci: one of tbe coior eeeie eepee; ig., t is sketch showing e remmer of erreregieg the coior tepee. l y

pticei pyrometere here 'beiit ce tile principio or comp-lering e coiore. obiect ythe specimen eiicier obeervetioe by siizer A posmg it :Le the irse oi merce emi changing f tile coter of tbe comperisoe object imtii it a n 40 sigselopeere egemst the beclrgrouedi or tbe observeci object; others ere mede by piercing in juxtaposition o, steelerdisec coloreci ob .A ject enel the erticie' to be observed, enti' changing the light om the stendardi or comparison objectn But in eii these there has been iculty in securing e, stencierci color for comparison; it hes beenl dicult to repeet observations in e uniform meneer, end the apparatus lies been more. or less compleX emi untrustwortliy.

in my invention 1 make e riirect comparison between the coior ci tbe metel under observetion emi the apparent coior of e particulier goe, t of e movable tape or other translucent article stenderdise emi. gleduateoi in euch e Weytbet ecole position on it always corresponds to e eeite teleoperatturc, and X provide this with e seele in sucia the opening (7). l direct comparison between. the object being l e meneer that temperature may be directly remi ofi" et the time of tbe observation.

Thus, in the simplified form of thedevice as shown in the accompanying drewingf show e motel tube 5 having en eye-piece 6. arranged for direct vision through en oppo site holey (i) upon e motel being examined, and in this tube mount an inclined mirror reiemec eee, ee?- iei e.

S in. any convenient form of support 9, :md 'i throw upon this mirror a, steridardized, but

'einaangezrb1e9 colored ii Jrht. l This is conveniently donc by adding a, supplemental tube 5*a which contains e battery 10, and electric light 11, placed in frontof the opening (12) of en opaque diephro 'im 13 over which i may mount e thin disk i film 14 of tre'ns? lucent stender orange' color. v`Within the tube 5 on e peir' of rolls 15 and 16 1 mount a treveling tape 17 passie over two guide' Mend 19 so that e at portion of the tope steeds in iront or :incl close to the transiucerit diaphragm 14. The rolis 15 and 16 may be held im piece by any convenient form ci spring 20 engaging the milled eripheries of e Herge 21 of the roll. e shaft ci esclu roll (16B) projects through the sicieof the tube 5 and is provided with a. millc beeii 161 for turning it to more tite tape 11Vk Tliie tape, es better shown in Fig. Se may e 1i ede oi such meteriei es celleloid and cio de in gre-dilated form from e practicelly tirenepercnt condition et one end to e precticeillyopeque condition et the other as iiiicete, ceci at the icie of the tape there is ascetic ii chewing tbe temperature correepornieeto eil particulier positions when this blec. cloud ie supcrposecl on tbe orange color er" tire' Elisir 1e. '1t will be seen therefore tlmt the iight from the l'emp 11 after'.

upon the mirror 8 end be reected outI the eyepiece 6 ,in e iirie perellelwith the line of .v

vision to the object being observed through We beve therefore s.

observed and the stendercl coior, and canmovetbe tape 14 to bring them to identical 'cppeerenoe whereupon the temperature is rcecidirectly on. the scale 17. Otherwise I may employ :my other combination of two translicent lms, es by combining two cellu- Ioid tapes es shown in Fig. 4. One of these ltapes may be s, standard. block cloud alnd the other e varying orange, or one may be a standard orange and the other a varying cloud, or one a standard yellow and the other a varying rcd etc., all as will be obvious to those familiar with the art.

I have found numerous advantages in the employment of two screens of 1Which one is a cloud of diffused black, and the other a standard yellow which can be indelinitely reproduced Without variation of color, and the transmitted light of which may be conveniently measured when desired. That is to say, the variables for controlling the color of the 'grange light is a mechanical mixture, and may therefore be better standardized. This has the additional advantage that the shifting of colors may be easily and conveniently made with any desired lineness of graduation.

Of course it will be understood that I am not limited to any particular material for the comparison color; the tape may be a fabric of'any kind, and it need not be necessarily translucent, but may be lighted by reliection in obvious Ways.

Funda-mentally, the principal advantages of my device-flow from the use of a standard but changeable color device, 'such 'as a film, and for making up this film by the' combi11- ing of a movable clouded part and a uni.- form and lXed part, as Well as from the colnpactness, convenience, and simplicity oi the mechanical construction.

Having thus described my invention and illustrated its use, what I claim is the following:

l. In a pyrometcr, a comparison color devi ce composed of two superposed translucent bodies of which one has a fixed standarda changeable cloud combining with the irst r to give the lcolor of heated metal various deinte temperatures.

In testimony whereof .l have hereunto signed my name.

Josera iv. vvnirznrnronn; 

